4x^2+15x-3=0

Simple and best practice solution for 4x^2+15x-3=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 4x^2+15x-3=0 equation:


Simplifying
4x2 + 15x + -3 = 0

Reorder the terms:
-3 + 15x + 4x2 = 0

Solving
-3 + 15x + 4x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
4 the coefficient of the squared term: 

Divide each side by '4'.
-0.75 + 3.75x + x2 = 0

Move the constant term to the right:

Add '0.75' to each side of the equation.
-0.75 + 3.75x + 0.75 + x2 = 0 + 0.75

Reorder the terms:
-0.75 + 0.75 + 3.75x + x2 = 0 + 0.75

Combine like terms: -0.75 + 0.75 = 0.00
0.00 + 3.75x + x2 = 0 + 0.75
3.75x + x2 = 0 + 0.75

Combine like terms: 0 + 0.75 = 0.75
3.75x + x2 = 0.75

The x term is 3.75x.  Take half its coefficient (1.875).
Square it (3.515625) and add it to both sides.

Add '3.515625' to each side of the equation.
3.75x + 3.515625 + x2 = 0.75 + 3.515625

Reorder the terms:
3.515625 + 3.75x + x2 = 0.75 + 3.515625

Combine like terms: 0.75 + 3.515625 = 4.265625
3.515625 + 3.75x + x2 = 4.265625

Factor a perfect square on the left side:
(x + 1.875)(x + 1.875) = 4.265625

Calculate the square root of the right side: 2.065338955

Break this problem into two subproblems by setting 
(x + 1.875) equal to 2.065338955 and -2.065338955.

Subproblem 1

x + 1.875 = 2.065338955 Simplifying x + 1.875 = 2.065338955 Reorder the terms: 1.875 + x = 2.065338955 Solving 1.875 + x = 2.065338955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.875' to each side of the equation. 1.875 + -1.875 + x = 2.065338955 + -1.875 Combine like terms: 1.875 + -1.875 = 0.000 0.000 + x = 2.065338955 + -1.875 x = 2.065338955 + -1.875 Combine like terms: 2.065338955 + -1.875 = 0.190338955 x = 0.190338955 Simplifying x = 0.190338955

Subproblem 2

x + 1.875 = -2.065338955 Simplifying x + 1.875 = -2.065338955 Reorder the terms: 1.875 + x = -2.065338955 Solving 1.875 + x = -2.065338955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.875' to each side of the equation. 1.875 + -1.875 + x = -2.065338955 + -1.875 Combine like terms: 1.875 + -1.875 = 0.000 0.000 + x = -2.065338955 + -1.875 x = -2.065338955 + -1.875 Combine like terms: -2.065338955 + -1.875 = -3.940338955 x = -3.940338955 Simplifying x = -3.940338955

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.190338955, -3.940338955}

See similar equations:

| 6(10-k)+10=-10(k-3)-2 | | -(3y+1)-(-2y-6)=5 | | 8x^2-2x+7=0 | | 7x^2+5x=1 | | 14y-17=12y-14 | | 4(3x-3)=14+x | | -48+-16y+-3y^2+y^3=0 | | 17=-5x-6x+14 | | 2x-7=4-3 | | -5x-10=-13 | | -10y=8-12x | | 12x-10y=8 | | 7+5y-2=8y+6-2y | | 28-2x=3x+17 | | .5(2x+2)-.25(3x-1)=15 | | 5y=7x-3 | | 3v^2+13v=-4 | | 2x+2y=18 | | 10x-3=87 | | 2-2n=4n+8 | | 28+2x=3x+17 | | 3{6}-= | | 3x-10=80+4 | | x(x+6)-6=x+3x+1 | | 3x+10=80-4 | | 3b=15 | | 3n+14n=153 | | 2347= | | -8.2x=49.2 | | 4x-2y+5=0 | | 4(2-9)=2(q+7) | | -9(3b+2)+(28b-7)=0 |

Equations solver categories